ES2459371T3 - Transmission of information in a mobile communications system - Google Patents
Transmission of information in a mobile communications system Download PDFInfo
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- ES2459371T3 ES2459371T3 ES07700858.9T ES07700858T ES2459371T3 ES 2459371 T3 ES2459371 T3 ES 2459371T3 ES 07700858 T ES07700858 T ES 07700858T ES 2459371 T3 ES2459371 T3 ES 2459371T3
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- 238000010295 mobile communication Methods 0.000 title claims abstract description 13
- 230000005540 biological transmission Effects 0.000 title description 25
- 238000000034 method Methods 0.000 claims abstract description 37
- 238000012423 maintenance Methods 0.000 claims abstract description 5
- 238000012546 transfer Methods 0.000 claims description 7
- 230000007704 transition Effects 0.000 claims 4
- 238000004891 communication Methods 0.000 abstract description 7
- 230000004044 response Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 101000741965 Homo sapiens Inactive tyrosine-protein kinase PRAG1 Proteins 0.000 description 2
- 102100038659 Inactive tyrosine-protein kinase PRAG1 Human genes 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/002—Transmission of channel access control information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/16—Discovering, processing access restriction or access information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/02—Selection of wireless resources by user or terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Método para asignar recursos de radiocomunicaciones en un sistema de comunicaciones móviles, comprendiendo el método: recibir, mediante un terminal móvil (10), información de agrupamiento relacionada con uno o más preámbulos para acceder a un Canal de Acceso Aleatorio, RACH; seleccionar (S11), mediante el terminal móvil (10), por lo menos un preámbulo de acuerdo con la información de agrupamiento; transmitir (S12), mediante el terminal móvil (10), dicho por lo menos un preámbulo seleccionado; recibir, mediante el terminal móvil (10), un recurso de radiocomunicaciones asignado de acuerdo con dicho por lo menos un preámbulo seleccionado; y transmitir (S14), mediante el terminal móvil (10), datos usando el recurso de radiocomunicaciones asignado, en el que dicho uno o más preámbulos son agrupados de acuerdo con criterios predeterminados, en el que los criterios predeterminados comprenden por lo menos uno de entre una finalidad para usar dicho RACH, información de Indicador de Calidad de Canal, una cantidad de recursos de radiocomunicaciones y un motivo de establecimiento, y en el que la finalidad para usar el RACH comprende uno de entre un acceso inicial, un traspaso, una sincronización de mantenimiento, una liberación de acceso y una solicitud de recursos de radiocomunicacionesMethod for allocating radio communication resources in a mobile communication system, the method comprising: receiving, by means of a mobile terminal (10), grouping information related to one or more preambles to access a Random Access Channel, RACH; selecting (S11), by means of the mobile terminal (10), at least one preamble according to the grouping information; transmitting (S12), via the mobile terminal (10), said at least one selected preamble; receiving, by means of the mobile terminal (10), an allocated radio resource in accordance with said at least one selected preamble; and transmitting (S14), via the mobile terminal (10), data using the allocated radio resource, wherein said one or more preambles are grouped according to predetermined criteria, wherein the predetermined criteria comprise at least one of between a purpose for using said RACH, Channel Quality Indicator information, an amount of radio resources and an establishment reason, and wherein the purpose for using the RACH comprises one of initial access, handover, maintenance synchronization, an access release and a request for radio resources
Description
Transmisión de información en un sistema de comunicaciones móviles. Transmission of information in a mobile communications system.
Solución técnica Technical solution
La presente exposición se refiere a la transmisión de información en un sistema de comunicaciones móviles. This presentation refers to the transmission of information in a mobile communications system.
10 La figura 1 ilustra una estructura de red ejemplificativa de un E-UMTS. El sistema E-UMTS es un sistema que ha evolucionado a partir de un sistema UMTS existente. 10 Figure 1 illustrates an exemplary network structure of an E-UMTS. The E-UMTS system is a system that has evolved from an existing UMTS system.
La normalización básica para el sistema E-UMTS está siendo desarrollada en la actualidad por el Proyecto de The basic standardization for the E-UMTS system is currently being developed by the Project of
15 Asociación de Tercera Generación (3GPP). Al sistema E-UMTS se le puede hacer referencia como sistema de Evolución a Largo Plazo (LTE). 15 Third Generation Association (3GPP). The E-UMTS system can be referred to as a Long Term Evolution (LTE) system.
Tal como se ilustra en la figura 1, una red E-UMTS puede constar de una E-UTRAN y una Red Central (CN). La E-UTRAN puede incluir un Equipo de Usuario (UE), una estación base, a la que se hace referencia como Nodo B 20 Evolucionado o eNB, y una Pasarela de Acceso (AG) situada en el extremo de la red y conectada a una red externa. As illustrated in Figure 1, an E-UMTS network may consist of an E-UTRAN and a Central Network (CN). The E-UTRAN may include a User Equipment (UE), a base station, referred to as Evolved Node B 20 or eNB, and an Access Gateway (AG) located at the end of the network and connected to an external network
La AG se puede dividir en una porción para procesar tráfico de usuario y una porción para procesar tráfico de control. La porción de la AG para procesar tráfico de usuario y la porción de la AG para procesar tráfico de control se pueden conectar entre sí por medio de una interfaz nueva para comunicación. The AG can be divided into a portion to process user traffic and a portion to process control traffic. The AG portion for processing user traffic and the AG portion for processing control traffic can be connected to each other through a new interface for communication.
25 En un Nodo B evolucionado (eNB) pueden existir una o más células. Los Nodos B evolucionados pueden estar conectados por medio de una interfaz para la transmisión de tráfico de usuario y/o tráfico de control. In an evolved Node B (eNB) there may be one or more cells. The evolved B nodes can be connected via an interface for the transmission of user traffic and / or control traffic.
La CN también puede incluir la AG y un nodo adaptado para registro de usuarios de un UE. En el E-UMTS se puede 30 proporcionar también una interfaz con el fin de dividir la E-UTRAN y la CN. The CN may also include the AG and a node adapted for user registration of a UE. In the E-UMTS, an interface can also be provided in order to divide the E-UTRAN and the CN.
Las capas de los protocolos de interfaz de radiocomunicaciones entre un terminal móvil y una red se pueden clasificar en una primera capa (L1), una segunda capa (L2) y una tercera capa (L3) sobre la base de las tres capas inferiores de un modelo de Interconexión de Sistemas Abiertos (OSI) el cual es ampliamente conocido en los The layers of the radio interface protocols between a mobile terminal and a network can be classified into a first layer (L1), a second layer (L2) and a third layer (L3) based on the three lower layers of a Open Systems Interconnection (OSI) model which is widely known in the
35 sistemas de comunicaciones. Una capa física de la primera capa proporciona un servicio de transferencia de información usando un canal físico. Una capa de Control de Recursos de Radiocomunicaciones (RRC) posicionada en la tercera capa controla recursos de radiocomunicaciones entre el terminal móvil y la red. 35 communication systems. A physical layer of the first layer provides an information transfer service using a physical channel. A Radiocommunication Resource Control (RRC) layer positioned in the third layer controls radiocommunication resources between the mobile terminal and the network.
La capa de RRC permite un intercambio de mensajes de RRC entre el terminal móvil y la red. La capa de RRC se The RRC layer allows an exchange of RRC messages between the mobile terminal and the network. The RRC layer is
40 puede posicionar en cada nodo de red, tal como el Nodo B evolucionado y la AG, o se puede posicionar o bien en el Nodo B evolucionado o bien en la AG. 40 can be positioned in each network node, such as the evolved Node B and the AG, or it can be positioned either in the evolved Node B or in the AG.
La figura 2 ilustra una arquitectura de protocolos de interfaz de radiocomunicaciones entre un terminal y una Red de Acceso de Radiocomunicaciones Terrestre UMTS (UTRAN) sobre la base de una especificación de red de acceso Figure 2 illustrates an architecture of radiocommunication interface protocols between a terminal and a UMTS Terrestrial Radio Access Network (UTRAN) based on an access network specification
45 de radiocomunicaciones 3GPP. Los protocolos de interfaz de radiocomunicaciones de la figura 2 están formados horizontalmente por una capa física, una capa de enlace de datos y una capa de red, y verticalmente por un plano de usuario para transmitir información de datos y un plano de control para transmitir señales de control. 45 3GPP radiocommunications. The radio interface protocols of Figure 2 are formed horizontally by a physical layer, a data link layer and a network layer, and vertically by a user plane for transmitting data information and a control plane for transmitting signals of control.
Las capas de protocolo de la figura 2 se pueden dividir en una primera capa (L1), una segunda capa (L2) y una The protocol layers of Figure 2 can be divided into a first layer (L1), a second layer (L2) and a
50 tercera capa (L3) sobre la base de las tres capas inferiores de un modelo de Interconexión de Sistemas Abiertos (OSI) el cual es ampliamente conocido en sistemas de comunicaciones. A continuación se explicarán cada capa de protocolo de radiocomunicaciones en el plano de control ilustrado en la figura 2 y cada capa de protocolo de radiocomunicaciones en el plano de usuario ilustrado en la figura 3. 50 third layer (L3) based on the three lower layers of an Open Systems Interconnection (OSI) model which is widely known in communications systems. Next, each radiocommunication protocol layer in the control plane illustrated in Figure 2 and each radiocommunication protocol layer in the user plane illustrated in Figure 3 will be explained.
55 Una capa física, la cual es una primera capa, proporciona un servicio de transferencia de información a una capa superior usando un canal físico. La capa física está conectada a una capa (situada en un nivel superior) de Control de Acceso al Medio (MAC) por medio de un canal de transporte. A physical layer, which is a first layer, provides an information transfer service to a higher layer using a physical channel. The physical layer is connected to a layer (located at a higher level) of Access Control to the Middle (MAC) through a transport channel.
Se transfieren datos entre la capa de MAC y la capa física por medio de un canal de transporte. Se transfieren Data is transferred between the MAC layer and the physical layer through a transport channel. Are transferred
60 también datos entre diferentes capas físicas, específicamente, entre una capa física de un lado de transmisión y una capa física de un lado de recepción. 60 also data between different physical layers, specifically, between a physical layer of a transmission side and a physical layer of a reception side.
Una capa de MAC de la segunda capa proporciona un servicio por medio de un canal lógico a una capa de Control de Enlace de Radiocomunicaciones (RLC), la cual es su capa superior. La capa de RLC de la segunda capa soporta A MAC layer of the second layer provides a service through a logical channel to a Radio Link Control (RLC) layer, which is its upper layer. The RLC layer of the second layer supports
65 una transmisión de datos fiable. 65 a reliable data transmission.
Las funciones llevadas a cabo por la capa de RLC se pueden implementar como un bloque funcional dentro del MAC. No obstante, puede que la capa de RLC no exista. The functions performed by the RLC layer can be implemented as a functional block within the MAC. However, the RLC layer may not exist.
Una capa de Protocolo de Convergencia de Datos por Paquetes (PDCP) de la segunda capa se usa para transmitir efectivamente datos usando un paquete de IP, tal como IPv4 o IPv6, sobre una interfaz de radiocomunicaciones con un ancho de banda relativamente pequeño. La capa de PDCP reduce información de control innecesaria usando una función denominada compresión de encabezamientos para esta finalidad. A Packet Data Convergence Protocol (PDCP) layer of the second layer is used to effectively transmit data using an IP packet, such as IPv4 or IPv6, over a radio interface with a relatively small bandwidth. The PDCP layer reduces unnecessary control information using a function called header compression for this purpose.
Una capa de Control de Recursos de Radiocomunicaciones (RRC) situada en la porción más baja de la tercera capa está definida únicamente en el plano de control. La capa de RRC gestiona los canales de transporte y físico para la configuración, re-configuración y liberación de portadores de radiocomunicaciones. Un Portador de Comunicaciones (RB) indica un servicio proporcionado por la segunda capa para transferencia de datos entre el terminal móvil y la UTRAN. A Radiocommunication Resource Control (RRC) layer located in the lower portion of the third layer is defined only in the control plane. The RRC layer manages the transport and physical channels for the configuration, re-configuration and release of radio bearers. A Communications Bearer (RB) indicates a service provided by the second layer for data transfer between the mobile terminal and the UTRAN.
Los canales de transporte de enlace descendente para transmitir datos desde una red a un terminal móvil pueden incluir un Canal de Difusión General (BCH) para transmitir información de sistema y un Canal Compartido (SCH) de enlace descendente para transmitir tráfico de usuario o un mensaje de control. Un mensaje de tráfico o control de un servicio de multidifusión o difusión general de enlace descendente se puede transmitir o bien por medio del SCH de enlace descendente o bien por medio de un Canal de Multidifusión (MCH) de enlace descendente aparte. Los canales de transporte de enlace ascendente para transmitir datos desde un terminal móvil a una red pueden incluir un Canal de Acceso Aleatorio (RACH) para transmitir un mensaje de control inicial y un Canal Compartido (SCH) de enlace ascendente para transmitir un mensaje de control o de tráfico de usuario. The downlink transport channels for transmitting data from a network to a mobile terminal may include a General Broadcast Channel (BCH) for transmitting system information and a Downlink Shared Channel (SCH) for transmitting user traffic or a message of control. A traffic or control message from a downlink general broadcast or broadcast service may be transmitted either by the downlink SCH or by a separate downlink Multicast Channel (MCH). The uplink transport channels for transmitting data from a mobile terminal to a network may include a Random Access Channel (RACH) for transmitting an initial control message and an uplink Shared Channel (SCH) for transmitting a control message or user traffic.
En lo sucesivo en la presente, se explicará de forma detallada un canal de acceso aleatorio (RACH). En general, un RACH se usa para obtener un recurso de radiocomunicaciones si no hay ningún recurso de radiocomunicaciones de enlace ascendente para transmitir datos cuando un terminal se adecua a una sincronización de tiempo con una red o el terminal transmite los datos correspondientes a través del enlace ascendente. Hereinafter, a random access channel (RACH) will be explained in detail. In general, a RACH is used to obtain a radiocommunication resource if there is no uplink radiocommunication resource to transmit data when a terminal conforms to a time synchronization with a network or the terminal transmits the corresponding data through the link upward.
Por ejemplo, un terminal en general se adecua a una sincronización de enlace ascendente para posibilitar la recepción de información de sistema desde una célula a la que desea acceder cuando el terminal se pone en marcha. El terminal debería transmitir un mensaje de solicitud de acceso a la red o estación base para una conexión de RRC después de recibir la información de sistema. No obstante, el terminal usa el RACH en caso de que no se adecue en ese momento a la sincronización de tiempo con la red y no adquiera un recurso de radiocomunicaciones de enlace ascendente. For example, a terminal in general is adapted to an uplink synchronization to enable the reception of system information from a cell to which it wishes to access when the terminal starts up. The terminal should transmit a request for access to the network or base station for an RRC connection after receiving the system information. However, the terminal uses the RACH in case it does not at that time synchronize with the network and does not acquire an uplink radio resource.
En otras palabras, el terminal solicita un recurso de radiocomunicaciones para transmitir un mensaje de solicitud de acceso de la red usando el RACH. A continuación, la estación base asigna un recurso de radiocomunicaciones apropiado al terminal con el fin de permitir que el terminal transmita un mensaje de conexión de RRC. El terminal entonces puede transmitir el mensaje de conexión de RRC a la red usando el recurso de radiocomunicaciones asignado. In other words, the terminal requests a radio resource to transmit an access request message from the network using the RACH. Next, the base station allocates an appropriate radio resource to the terminal in order to allow the terminal to transmit an RRC connection message. The terminal can then transmit the RRC connection message to the network using the assigned radio resource.
En otro ejemplo, el terminal adquiere un recurso de radiocomunicaciones de la red de acuerdo con una planificación de recursos de radiocomunicaciones y transmite datos a la red usando el recurso de radiocomunicaciones asignado cuando el terminal forma una conexión de RRC con la red. No obstante, la red puede no asignar el recurso de radiocomunicaciones de enlace ascendente si no quedan datos en la memoria intermedia del terminal puesto que la asignación de un recurso de radiocomunicaciones de enlace ascendente a un terminal que no tiene ningún dato a transmitir es ineficiente. A la red se le informa del estado de la memoria intermedia del terminal de manera periódica In another example, the terminal acquires a radiocommunication resource from the network according to a planning of radiocommunications resources and transmits data to the network using the assigned radio resource when the terminal forms an RRC connection to the network. However, the network may not allocate the uplink radiocommunication resource if there is no data left in the terminal buffer since the allocation of an uplink radiocommunication resource to a terminal that has no data to be transmitted is inefficient. The network is informed of the status of the terminal buffer periodically
o de acuerdo con una generación de eventos. Si en la memoria intermedia se generan datos nuevos que no requieren un recurso de radiocomunicaciones, el terminal usa el RACH puesto que en ese momento no tiene asignado el recurso de radiocomunicaciones de enlace ascendente. En otras palabras, el terminal solicita un recurso de radiocomunicaciones requerido para transmisión de datos de la red usando el RACH. or according to a generation of events. If new data is generated in the buffer that does not require a radio resource, the terminal uses the RACH since it does not currently have the uplink radio resource assigned. In other words, the terminal requests a radio resource required for transmission of network data using the RACH.
A continuación se explicará en la presente un RACH en un Acceso Múltiple por División de Código de Banda Ancha (WCDMA). El canal RACH se usa para transmitir datos con una longitud pequeña a través de un enlace ascendente. Next, a RACH in a Multiple Access by Broadband Code Division (WCDMA) will be explained herein. The RACH channel is used to transmit data with a small length through an uplink.
Sobre el RACH se puede transmitir una porción de mensajes de RRC, tales como un mensaje de solicitud de conexión de RRC, un mensaje de actualización de célula o un mensaje de actualización de URA. Se establece una correspondencia de un canal lógico CCCH (Canal de Control Común), DCCH (Canal de Control Dedicado) y DTCH (Canal de Tráfico Dedicado) con el RACH, y se establece una correspondencia del RACH con un canal físico PRACH (Canal de Acceso Aleatorio Físico). A portion of RRC messages, such as an RRC connection request message, a cell update message or a URA update message, can be transmitted over the RACH. A correspondence of a logical channel CCCH (Common Control Channel), DCCH (Dedicated Control Channel) and DTCH (Dedicated Traffic Channel) is established with the RACH, and a RACH correspondence is established with a physical channel PRACH (Channel Random Physical Access).
La capa física de un terminal selecciona una ranura de acceso y una firma para transmitir un preámbulo de PRACH por medio de un enlace ascendente, cuando el MAC del terminal indica una transmisión de PRACH a una capa física del terminal. El preámbulo se transmite durante un intervalo de ranura de acceso que tiene una longitud de 1,33 ms. Se selecciona y transmite una de entre 16 firmas durante una cierta longitud de una porción inicial de la ranura de acceso. The physical layer of a terminal selects an access slot and a signature to transmit a PRACH preamble via an uplink, when the MAC of the terminal indicates a transmission of PRACH to a physical layer of the terminal. The preamble is transmitted during an access slot interval that is 1.33 ms in length. One of 16 signatures is selected and transmitted for a certain length of an initial portion of the access slot.
La estación base transmite una señal de respuesta usando un canal físico de enlace descendente AICH (Canal Indicador de Adquisición) después de que el terminal transmita el preámbulo. El AICH transmitido como respuesta al preámbulo transmite la firma seleccionada por el preámbulo durante una cierta longitud de la porción inicial de la ranura de acceso correspondiente a la ranura de acceso transmitida. The base station transmits a response signal using a physical downlink channel AICH (Acquisition Indicator Channel) after the terminal transmits the preamble. The AICH transmitted in response to the preamble transmits the signature selected by the preamble for a certain length of the initial portion of the access slot corresponding to the transmitted access slot.
La estación base transmite una respuesta positiva (ACK) o respuesta negativa (NACK) al terminal usando la firma transmitida desde el AICH. El terminal transmite una porción de mensaje con una longitud de 10 ms ó 20 ms usando un código OVSF correspondiente a la firma transmitida al producirse la recepción del ACK. El MAC del terminal indica nuevamente la transmisión de PRACH a la capa física del terminal después de un periodo de tiempo apropiado al producirse la recepción del NACK. El terminal transmite un preámbulo nuevo usando potencia de un nivel superior a la del preámbulo previo después de una ranura de acceso designada si el terminal no ha recibido el AICH correspondiente a un preámbulo transmitido previamente. The base station transmits a positive response (ACK) or negative response (NACK) to the terminal using the signature transmitted from the AICH. The terminal transmits a message portion with a length of 10 ms or 20 ms using an OVSF code corresponding to the signature transmitted upon receipt of the ACK. The MAC of the terminal again indicates the transmission of PRACH to the physical layer of the terminal after an appropriate period of time upon receipt of the NACK. The terminal transmits a new preamble using power of a higher level than the previous preamble after a designated access slot if the terminal has not received the AICH corresponding to a preamble transmitted previously.
La información del Indicador de Calidad de Canal (CQI) es información que posibilita que un terminal mida un estado de un canal de enlace descendente en una célula actual y que proporcione el estado medido a la estación base. A continuación, la estación base lleva a cabo una planificación de recursos de radiocomunicaciones usando la información de CQI proporcionada. Por ejemplo, si el valor de CQI puede estar entre 1 y 10, 1 indica que un canal no se encuentra en un buen estado y 10 indica que el canal se encuentra en un buen estado. The Channel Quality Indicator (CQI) information is information that allows a terminal to measure a state of a downlink channel in a current cell and to provide the measured state to the base station. Next, the base station carries out a planning of radio resources using the CQI information provided. For example, if the CQI value can be between 1 and 10, 1 indicates that a channel is not in a good state and 10 indicates that the channel is in a good state.
La estación base puede determinar que el canal de enlace descendente actual se encuentra en un buen estado y transmitir datos al terminal según una velocidad de bits superior cuando el terminal transmite información de CQI de 10 a la estación base. Por el contrario, la estación base puede determinar que el canal de enlace descendente no se encuentra en un buen estado y transmitir datos al terminal de acuerdo con una velocidad de bits inferior cuando el terminal transmite información de CQI de 1 a la estación base. La estación base informa previamente al terminal de que el mismo debería realizar informes de manera periódica o de acuerdo con una generación de eventos con el fin de transmitir la información de CQI. The base station may determine that the current downlink channel is in a good state and transmit data to the terminal at a higher bit rate when the terminal transmits CQI information of 10 to the base station. In contrast, the base station may determine that the downlink channel is not in a good state and transmit data to the terminal according to a lower bit rate when the terminal transmits CQI information of 1 to the base station. The base station previously informs the terminal that it should report periodically or in accordance with a generation of events in order to transmit the CQI information.
Los presentes inventores reconocieron por lo menos los siguientes problemas en procedimientos actualmente existentes de RACH. Tal como se ha indicado previamente, el terminal en primer lugar selecciona una firma y una ranura de acceso, y a continuación transmite un preámbulo a través de un enlace ascendente cuando se usa el RACH. Después de esto, el terminal transmite una porción de mensaje a la estación base al producirse la recepción de un ACK desde la estación base como respuesta al preámbulo. Por lo tanto, el terminal debe llevar a cabo la transmisión del preámbulo, la recepción del ACK y la transmisión de las porciones de mensaje con el fin de informar a la estación base sobre información específica usando el RACH en métodos de la técnica relacionada. Como consecuencia, el tiempo de retardo se incrementa y se derrochan recursos de radiocomunicaciones. Basándose en el reconocimiento mencionado de los problemas, los presentes inventores han ideado varias características y aspectos descritos en la presente. The present inventors recognized at least the following problems in currently existing RACH procedures. As previously indicated, the terminal first selects a signature and an access slot, and then transmits a preamble through an uplink when the RACH is used. After this, the terminal transmits a message portion to the base station upon receipt of an ACK from the base station in response to the preamble. Therefore, the terminal must carry out the transmission of the preamble, the reception of the ACK and the transmission of the message portions in order to inform the base station about specific information using the RACH in related art methods. As a consequence, the delay time is increased and radio resources are wasted. Based on the mentioned recognition of the problems, the present inventors have devised several features and aspects described herein.
El documento WO 2004/030392 A1 se refiere a un método, un producto de programa de ordenador y un dispositivo para solicitar acceso a un nodo de una red de comunicaciones inalámbricas. En la red se usan códigos de identificación para diferenciar solicitudes de acceso de componentes diferentes de la red. El método comprende la etapa de determinar información sobre un trayecto de transmisión al, por ejemplo, nodo de red, la etapa de determinar un código de identificación en función de la información determinada del trayecto de transmisión, en donde se ha establecido previamente una asociación entre códigos de identificación e información de trayectos de transmisión, y la etapa de modular el código de identificación seleccionado sobre una señal para generar una señal de solicitud de acceso que transporta información de trayectos de transmisión. WO 2004/030392 A1 refers to a method, a computer program product and a device for requesting access to a node of a wireless communications network. Identification codes are used in the network to differentiate access requests from different components of the network. The method comprises the step of determining information about a transmission path to, for example, network node, the step of determining an identification code based on the determined information of the transmission path, where an association between previously established identification codes and transmission path information, and the step of modulating the selected identification code on a signal to generate an access request signal that conveys transmission path information.
Un aspecto de la presente exposición consiste en proporcionar un método de transmisión de información en un sistema de comunicaciones móviles, que evita el consumo innecesario de recursos de radiocomunicaciones y reduce el tiempo de retardo para la transferencia de información. One aspect of the present presentation consists in providing a method of transmitting information in a mobile communications system, which avoids the unnecessary consumption of radio resources and reduces the delay time for the transfer of information.
En un aspecto, se proporciona un método para asignar recursos de radiocomunicaciones en un sistema de comunicaciones móviles. El método se define por medio de la reivindicación independiente 1. Las reivindicaciones dependientes 2 a 7 definen formas de realización específicas del método. In one aspect, a method for allocating radio resources in a mobile communication system is provided. The method is defined by independent claim 1. Dependent claims 2 to 7 define specific embodiments of the method.
En otro aspecto de esta exposición, se proporciona un método para asignar recursos de radiocomunicaciones en un sistema de comunicaciones móviles. El método se define por medio de la reivindicación independiente 8. Las reivindicaciones dependientes 9 a 15 definen formas de realización específicas del método. In another aspect of this discussion, a method for allocating radio resources in a mobile communication system is provided. The method is defined by independent claim 8. Dependent claims 9 to 15 define specific embodiments of the method.
Las anteriores características y aspectos, y otros, de la presente exposición se pondrán más claramente de manifiesto a partir de la siguiente descripción detallada, cuando se consideren conjuntamente con los dibujos adjuntos. The above characteristics and aspects, and others, of the present presentation will become more clearly apparent from the following detailed description, when considered in conjunction with the accompanying drawings.
En la descripción que se ofrece a continuación se expondrán características y aspectos adicionales, y los mismos se pondrán de manifiesto en parte a partir de la descripción, o se pueden asimilar al poner en práctica las In the description given below, additional features and aspects will be presented, and they will be revealed in part from the description, or can be assimilated when implementing the
características de esta exposición. Debe entenderse que tanto la anterior descripción general como la siguiente descripción detallada son ejemplificativas y explicativas, y están destinadas a proporcionar una explicación adicional de las reivindicaciones. characteristics of this exhibition. It should be understood that both the above general description and the following detailed description are exemplary and explanatory, and are intended to provide a further explanation of the claims.
Estas y otras formas de realización ejemplificativas se pondrán también fácilmente de manifiesto para aquellos expertos en la materia a partir de la siguiente descripción detallada de las formas de realización en referencia a las figuras adjuntas, no limitándose las características de la presente a ninguna forma de realización particular dada a conocer. These and other exemplary embodiments will also be readily apparent to those skilled in the art from the following detailed description of the embodiments in reference to the attached figures, the characteristics of the present not being limited to any embodiment particular released.
Los dibujos adjuntos, los cuales se incluyen para proporcionar una comprensión adicional y están incorporados a la presente memoria descriptiva y constituyen parte de la misma, ilustran varias formas de realización ejemplificativas y, junto con la descripción, sirven para explicar los principios de la presente exposición. Las características, elementos, y aspectos a los que remiten los mismos numerales en figuras diferentes representan características, elementos, o aspectos iguales, equivalentes, o similares, de acuerdo con una o más formas de realización. The accompanying drawings, which are included to provide additional understanding and are incorporated herein and constitute part thereof, illustrate several exemplary embodiments and, together with the description, serve to explain the principles of the present disclosure. . The characteristics, elements, and aspects to which the same numerals refer in different figures represent characteristics, elements, or similar, equivalent, or similar aspects, in accordance with one or more embodiments.
La figura 1 ilustra una estructura de red ejemplificativa de un E-UMTS que es un sistema de comunicaciones móviles. Figure 1 illustrates an exemplary network structure of an E-UMTS that is a mobile communications system.
La figura 2 ilustra cada capa sobre un plano de control de protocolos de radiocomunicaciones. Figure 2 illustrates each layer on a radiocommunication protocol control plane.
La figura 3 ilustra cada capa sobre un plano de usuario de protocolos de radiocomunicaciones. Figure 3 illustrates each layer on a user plane of radiocommunication protocols.
La figura 4 ilustra un agrupamiento de todas las ocasiones de RACH por una estación base de acuerdo con una finalidad particular según cierta(s) forma(s) de realización. Figure 4 illustrates a grouping of all RACH occasions by a base station according to a particular purpose according to certain embodiment (s).
La figura 5 ilustra cómo una estación base combina firmas y ocasiones de RACH para su agrupamiento según cierta(s) forma(s) de realización. Figure 5 illustrates how a base station combines RACH signatures and occasions for grouping according to certain embodiment (s).
La figura 6 ilustra un agrupamiento de acuerdo con la combinación de un motivo de establecimiento e información de CQI, descrita en la figura 5. Figure 6 illustrates a grouping according to the combination of an establishment reason and CQI information, described in Figure 5.
La figura 7 ilustra un flujo de señales de un método para transmitir información en un sistema de comunicaciones móviles de acuerdo con cierta(s) forma(s) de realización. Figure 7 illustrates a signal flow of a method for transmitting information in a mobile communication system in accordance with certain embodiment (s).
A continuación se ofrecerá una descripción detallada en referencia a los dibujos adjuntos. Las características de la presente se pueden implementar en un sistema de comunicaciones móviles, tal como un UMTS. No obstante, dichas características se pueden aplicar a otros sistemas de comunicaciones que se hacen funcionar de acuerdo con otras especificaciones. A detailed description will be given below in reference to the attached drawings. The features of this may be implemented in a mobile communications system, such as a UMTS. However, these features can be applied to other communications systems that are operated according to other specifications.
La presente exposición propone un método mediante el cual un terminal informa a una estación base de cierta información usando una firma de preámbulo y temporización de transmisión, o una ocasión de transmisión, de un RACH con el fin de reducir el tiempo de retardo antes de transmitir datos y hacer un uso eficiente de recursos de radiocomunicaciones de enlace ascendente. Con el fin de lograr esto, las características descritas en la presente clasifican firmas y ocasiones de transmisión de acuerdo con información de uso específica. The present exposition proposes a method by which a terminal informs a base station of certain information using a preamble and transmission timing signature, or a transmission occasion, of a RACH in order to reduce the delay time before transmitting data and make efficient use of uplink radiocommunication resources. In order to achieve this, the characteristics described herein classify signatures and transmission occasions according to specific usage information.
En una forma de realización, las características se implementan de tal manera que un preámbulo se puede transmitir seleccionando una firma y un recurso a partir de firmas agrupadas de acuerdo con una primera información y ocasiones de transmisión agrupadas de acuerdo con una segunda información en un grupo de firmas y un grupo de recursos de RACH clasificados según diversa información específica. La información específica puede incluir finalidad de uso del RACH, información de CQI, información relacionada con una cantidad seleccionada de recurso de radiocomunicaciones e información sobre un motivo de establecimiento. In one embodiment, the features are implemented in such a way that a preamble can be transmitted by selecting a signature and a resource from signatures grouped according to a first information and transmission occasions grouped according to a second information in a group. of firms and a group of RACH resources classified according to various specific information. Specific information may include the purpose of use of the RACH, information from CQI, information related to a selected amount of radio resource and information on an establishment reason.
Por ejemplo, la finalidad de uso del RACH puede incluir un acceso inicial de un terminal, un traspaso, mantenimiento de sincronización, una liberación de acceso, y una solicitud de recursos de radiocomunicaciones. La información de CQI es un valor que indica un estado del canal de enlace descendente. La cantidad solicitada de recurso de radiocomunicaciones indica un estado de memoria intermedia del terminal, el cual se puede indicar con 50 bits, 100 bits ó 200 bits. El motivo de establecimiento puede indicar una llamada de emergencia, cambio del terminal desde un estado de reposo a un estado activo, o cambio del terminal de un estado desconectado, o separación, a un estado activo. For example, the purpose of using the RACH may include initial access of a terminal, a handover, synchronization maintenance, a release of access, and a request for radio resources. The CQI information is a value that indicates a status of the downlink channel. The requested amount of radio resource indicates a buffer state of the terminal, which can be indicated with 50 bits, 100 bits or 200 bits. The reason for establishment may indicate an emergency call, change of the terminal from an idle state to an active state, or change of the terminal from a disconnected state, or separation, to an active state.
El recurso de RACH puede indicar una ocasión de RACH. Específicamente, el recurso de RACH indica informar a terminales, dentro de una célula, sobre información de recursos relacionada con el uso del RACH por la estación base. The RACH resource may indicate an occasion of RACH. Specifically, the RACH resource indicates to inform terminals, within a cell, about resource information related to the use of the RACH by the base station.
La información de recursos se configura con una frecuencia específica y un tiempo específico. La información de recursos puede incluir también una duración de la ocasión de RACH. Resource information is configured with a specific frequency and a specific time. Resource information may also include a duration of the RACH occasion.
En otra forma de realización, las características se implementan de tal manera que un preámbulo se puede transmitir seleccionando una firma a partir de la combinación de firmas y ocasiones de RACH y un grupo configurado con la combinación, así como usando firmas agrupadas de acuerdo con una primera información y ocasiones de transmisión agrupadas de acuerdo con una segunda información. En una forma de realización ejemplificativa, una firma siempre tiene el mismo significado, tal como información. No obstante, una firma puede tener otro significado de acuerdo con una ocasión de transmisión con la cual se combina en esta forma de realización. In another embodiment, the features are implemented in such a way that a preamble can be transmitted by selecting a signature from the combination of signatures and occasions of RACH and a group configured with the combination, as well as using signatures grouped according to a first information and transmission occasions grouped according to a second information. In an exemplary embodiment, a signature always has the same meaning, such as information. However, a signature may have another meaning according to a transmission occasion with which it is combined in this embodiment.
A continuación se ofrecerá una explicación de un método para seleccionar una firma y un recurso a partir de firmas agrupadas de acuerdo con una primera información y ocasiones de transmisión agrupadas de acuerdo con una segunda información con el fin de transmitir un preámbulo. An explanation of a method for selecting a signature and a resource from signatures grouped according to a first information and transmission occasions grouped according to a second information will then be offered in order to transmit a preamble.
Selección de firmas Signature Selection
Una estación base agrupa todas las firmas de acuerdo con una finalidad específica. Se transmite información, relacionada con las firmas agrupadas, a un terminal, usando información de sistema o un mensaje de búsqueda (en inglés, “paging message”). Por lo tanto, el terminal selecciona un grupo de firmas de entre grupos de firmas clasificados de acuerdo con información específica relacionada con un estado del terminal cuando se usa un RACH. El terminal selecciona aleatoriamente una firma de entre el grupo de firmas correspondiente una vez que se ha seleccionado el grupo de firmas mencionado. A base station groups all signatures according to a specific purpose. Information, related to the grouped signatures, is transmitted to a terminal, using system information or a search message (in English, "paging message"). Therefore, the terminal selects a group of signatures from among groups of signatures classified according to specific information related to a status of the terminal when a RACH is used. The terminal randomly selects a signature from the corresponding signature group once the aforementioned signature group has been selected.
Por ejemplo, si hay 64 firmas, se asignan los numerales 0 a 63 a las firmas. La estación base utiliza una finalidad de uso de RACH como información específica que es un criterio para el agrupamiento. Un grupo 1 se puede configurar para la finalidad de un acceso inicial, un grupo 2 se puede configurar para la finalidad de un traspaso, un grupo 3 se puede configurar para la finalidad de un mantenimiento de sincronización, un grupo 4 se puede configurar para la finalidad de una liberación de acceso, y un grupo 5 se puede configurar para la finalidad de una solicitud de recursos de radiocomunicaciones. La estación base establece una correspondencia apropiadamente de todas las firmas con cada grupo. For example, if there are 64 signatures, the numerals 0 to 63 are assigned to the signatures. The base station uses a purpose of using RACH as specific information that is a criterion for grouping. A group 1 can be configured for the purpose of an initial access, a group 2 can be configured for the purpose of a handover, a group 3 can be configured for the purpose of synchronization maintenance, a group 4 can be configured for purpose of an access release, and a group 5 can be configured for the purpose of a request for radio resources. The base station appropriately maps all signatures with each group.
En otras palabras, el grupo 1 tiene las firmas 0 a 11, el grupo 2 tiene las firmas 12 a 23, el grupo 3 tiene las firmas 24 a 35, el grupo 4 tiene las firmas 36 a 47, y el grupo 5 tiene las firmas 48 a 63. La información (o información de agrupamiento) en relación con las firmas agrupadas de acuerdo con la finalidad de uso del RACH se transmite al terminal usando información de sistema o un mensaje de búsqueda. Por lo tanto, el terminal selecciona el grupo 2 de acuerdo con la información de agrupamiento establecida y, después de esto, selecciona aleatoriamente una de las firmas que tienen los numerales del 12 a 23 con correspondencias establecidas con el grupo 2 en caso de que la finalidad de RACH sea para un traspaso. In other words, group 1 has signatures 0 to 11, group 2 has signatures 12 to 23, group 3 has signatures 24 to 35, group 4 has signatures 36 to 47, and group 5 has the signatures Signatures 48 to 63. The information (or grouping information) in relation to the signatures grouped according to the purpose of using the RACH is transmitted to the terminal using system information or a search message. Therefore, the terminal selects group 2 according to the established grouping information and, after this, randomly selects one of the signatures that have the numerals from 12 to 23 with correspondence established with group 2 in case the RACH purpose is for a transfer.
Además, la estación base puede cambiar dinámicamente la información de agrupamiento. En otras palabras, la estación base puede establecer correspondencias de más firmas con el grupo correspondiente si los terminales dentro de una célula usan frecuentemente un cierto grupo de entre los grupos de firmas. In addition, the base station can dynamically change the grouping information. In other words, the base station can match more signatures with the corresponding group if the terminals within a cell frequently use a certain group from among the signature groups.
Por ejemplo, si el grupo 4 tiene 12 firmas y el grupo 5 tiene 16 firmas, la estación base puede reducir el número de firmas en el grupo 4 e incrementar el número de firmas en el grupo 5 si una frecuencia de uso del terminal dentro de la célula es baja en el grupo 4 y alta en el grupo 5. La información cambiada relacionada con el agrupamiento de firmas se transmite desde la estación base al terminal usando información de sistema o un mensaje de búsqueda. For example, if group 4 has 12 signatures and group 5 has 16 signatures, the base station can reduce the number of signatures in group 4 and increase the number of signatures in group 5 if a frequency of terminal use within the cell is low in group 4 and high in group 5. The changed information related to the signature pool is transmitted from the base station to the terminal using system information or a search message.
Selección de ocasiones de RACH Selection of RACH occasions
Tal como se ilustra en la figura 4, la estación base agrupa ocasiones de RACH completas de acuerdo con una finalidad específica. La finalidad específica puede ser la misma que la información específica dada a conocer previamente, usada como criterio para el agrupamiento de firmas, o puede ser diferente. As illustrated in Figure 4, the base station groups complete RACH occasions according to a specific purpose. The specific purpose may be the same as the specific information previously disclosed, used as a criterion for the grouping of signatures, or it may be different.
Por ejemplo, las firmas se pueden agrupar de acuerdo con la finalidad de uso del RACH y las ocasiones de RACH se pueden agrupar de acuerdo con información de CQI o tanto las firmas como las ocasiones de RACH se pueden agrupar de acuerdo con la finalidad de uso del RACH. La información de agrupamiento relacionada con las ocasiones de RACH agrupadas se transmite al terminal usando información de sistema o un mensaje de búsqueda. For example, signatures can be grouped according to the purpose of RACH use and RACH occasions can be grouped according to CQI information or both RACH signatures and occasions can be grouped according to the purpose of use of the RACH. The grouping information related to the grouped RACH occasions is transmitted to the terminal using system information or a search message.
Por consiguiente, se selecciona un grupo de entre los grupos de las ocasiones de RACH de acuerdo con el estado del terminal cuando el terminal usa un RACH. Si el grupo seleccionado incluye dos o más ocasiones de RACH, el terminal selecciona aleatoriamente una ocasión de RACH a partir del grupo seleccionado. Accordingly, a group is selected from the groups of the RACH occasions according to the state of the terminal when the terminal uses a RACH. If the selected group includes two or more RACH occasions, the terminal randomly selects a RACH occasion from the selected group.
La estación base usa información de CQI como información específica para agrupar ocasiones de RACH. Por ejemplo, la estación base agrupa un grupo A con un estado de canal deficiente, un grupo B con un estado de canal bueno, y un grupo C con el mejor estado de canal. La estación base establece correspondencias apropiadamente de las ocasiones de RACH con cada grupo. The base station uses CQI information as specific information to group RACH occasions. For example, the base station groups a group A with a poor channel status, a group B with a good channel status, and a group C with the best channel status. The base station appropriately maps RACH occasions with each group.
Información relacionada con el agrupamiento de acuerdo con la información de CQI se transmite al terminal usando información de sistema o un mensaje de búsqueda. El terminal selecciona el grupo A de acuerdo con la información de agrupamiento establecida si el terminal se encuentra en un estado de canal deficiente. El terminal selecciona aleatoriamente una ocasión de RACH si el grupo A incluye dos o más ocasiones de RACH. Information related to the grouping according to the CQI information is transmitted to the terminal using system information or a search message. The terminal selects group A according to the grouping information established if the terminal is in a poor channel state. The terminal randomly selects a RACH occasion if group A includes two or more RACH occasions.
La estación base también puede cambiar dinámicamente la información de agrupamiento. La información de agrupamiento que es cambiada por la estación base cada periodo de la ocasión de RACH o cada múltiplo del periodo, se transmite al terminal usando información de sistema o un mensaje de búsqueda. The base station can also dynamically change the grouping information. The grouping information that is changed by the base station each period of the RACH occasion or each multiple of the period, is transmitted to the terminal using system information or a search message.
A continuación se explicará un método de selección de uno de los grupos configurados mediante la combinación de firmas y ocasiones de RACH con el fin de transmitir un preámbulo. En este método, una firma particular puede no tener siempre la misma información. Por ejemplo, la misma firma puede entregar información diferente en función de una ocasión de RACH con la cual se combine. Next, a method of selecting one of the groups configured by combining RACH signatures and occasions in order to transmit a preamble will be explained. In this method, a particular firm may not always have the same information. For example, the same firm may deliver different information based on a RACH occasion with which it is combined.
La figura 5 ilustra cómo una estación base combina firmas y ocasiones de RACH para su agrupamiento. La figura 6 ilustra un agrupamiento concreto de acuerdo con la combinación de un motivo de establecimiento e información de CQI, descrito en la figura 5. Figure 5 illustrates how a base station combines RACH signatures and occasions for grouping. Figure 6 illustrates a specific grouping according to the combination of an establishment reason and CQI information, described in Figure 5.
Tal como se ilustra en la figura 5, dentro de un periodo, existen cuatro ocasiones de RACH A, B, C y D. Las cuatro ocasiones de RACH pueden existir al mismo tiempo tal como se muestra en la figura 5 ó pueden existir por separado en momentos diferentes. Por ejemplo, las cuatro ocasiones A, B, C y D de RACH pueden existir todas ellas en el Tiempo 2 ó pueden existir por separado en los tiempos 4, 5 y 6. Se supone que el número total de firmas es 16. As illustrated in Figure 5, within a period, there are four occasions of RACH A, B, C and D. The four occasions of RACH can exist at the same time as shown in Figure 5 or they can exist separately at different times. For example, the four occasions A, B, C and D of RACH may all exist at Time 2 or may exist separately at times 4, 5 and 6. The total number of signatures is assumed to be 16.
El motivo de establecimiento y la información de CQI se usan como criterios para un agrupamiento. El motivo de establecimiento y la información de CQI se usan, respectivamente, en dos casos. Se generan cuatro grupos usando el motivo de establecimiento y la información de CQI tal como se ilustra en la figura 6. El terminal selecciona aleatoriamente un valor a partir de un tercer grupo que incluye C5 a C9 y D0 a D8 si el motivo del establecimiento del terminal es A y el valor de CQI es 1. C5 indica una ocasión de RACH de C y una firma de 5. The reason for establishment and the CQI information are used as criteria for a grouping. The reason for establishment and the CQI information are used, respectively, in two cases. Four groups are generated using the establishment reason and the CQI information as illustrated in Figure 6. The terminal randomly selects a value from a third group that includes C5 to C9 and D0 to D8 if the reason for the establishment of the terminal is A and the value of CQI is 1. C5 indicates an occasion of RACH of C and a signature of 5.
Tal como se ha indicado previamente, una firma y una ocasión de RACH pueden no indicar siempre la misma información. Por ejemplo, una firma 10 puede entregar información diferente en función de la ocasión de RACH con la cual se combine. Una ocasión de RACH A también puede entregar información diferente en función de la firma con la cual se combine. La información de agrupamiento de acuerdo con la combinación de firmas y ocasiones de RACH se transmite también al terminal usando información de sistema o un mensaje de búsqueda. As previously indicated, a RACH signature and occasion may not always indicate the same information. For example, a signature 10 may deliver different information depending on the occasion of RACH with which it is combined. An occasion of RACH A can also deliver different information depending on the signature with which it is combined. The grouping information according to the combination of RACH signatures and occasions is also transmitted to the terminal using system information or a search message.
La figura 7 ilustra un flujo de señales ejemplificativo de un método de transmisión de información en un sistema de comunicaciones móviles de acuerdo con una cierta(s) forma(s) de realización. Tal como se ilustra en la figura 7, una estación base 20 agrupa firmas y ocasiones de RACH completas según finalidades específicas e informa a un terminal 10 de información relacionada con el agrupamiento usando información de sistema o un mensaje de búsqueda (S10). Figure 7 illustrates an exemplary signal flow of a method of information transmission in a mobile communication system in accordance with a certain embodiment (s). As illustrated in Figure 7, a base station 20 groups complete RACH signatures and occasions according to specific purposes and informs a terminal 10 of information related to the grouping using system information or a search message (S10).
De acuerdo con una configuración de la estación base 20, el terminal 10 selecciona una firma y una ocasión de RACH de entre los grupos de firmas y ocasiones de RACH, o selecciona un grupo de entre grupos configurados mediante la combinación de firmas y ocasiones de RACH (S11). Usando el ejemplo previo, el terminal 10 selecciona un valor del tercer grupo que incluye C5 a C9 y D0 a D8. According to a configuration of the base station 20, the terminal 10 selects a RACH signature and occasion from the RACH signature groups and occasions, or selects a group from among groups configured by combining RACH signatures and occasions. (S11). Using the previous example, terminal 10 selects a value from the third group that includes C5 to C9 and D0 to D8.
A continuación, el terminal 10 transmite un preámbulo a la estación base 20 usando la firma y la ocasión de RACH seleccionadas (S12). La estación base 20 determina entonces a qué grupo pertenecen la firma y la ocasión de RACH correspondientes, y planifica un recurso de radiocomunicaciones de acuerdo con la determinación con el fin de asignar un recurso de radiocomunicaciones apropiado al terminal 10 (S13). Next, terminal 10 transmits a preamble to base station 20 using the selected signature and occasion of RACH (S12). The base station 20 then determines to which group the corresponding RACH signature and occasion belong, and plans a radiocommunication resource in accordance with the determination in order to assign an appropriate radiocommunication resource to terminal 10 (S13).
Por ejemplo, cuando el terminal 10 ha usado un grupo de firmas para un acceso inicial y se han agrupado ocasiones de RACH de acuerdo con una cantidad solicitada de recursos de radiocomunicaciones de 100 bits, la estación base 20 asigna un recurso de radiocomunicaciones apropiado al terminal basándose en la información. El terminal usa el recurso de radiocomunicaciones correspondiente para transmitir datos de enlace ascendente a la estación base 20, después de recibir el recurso de radiocomunicaciones apropiado asignado desde la estación base (S14). For example, when terminal 10 has used a group of signatures for initial access and RACH occasions have been grouped according to a requested amount of 100-bit radio resources, base station 20 assigns an appropriate radio resource to the terminal Based on the information. The terminal uses the corresponding radiocommunication resource to transmit uplink data to the base station 20, after receiving the appropriate radiocommunication resource assigned from the base station (S14).
Las características descritas en la presente se pueden implementar de tal manera que se use una transmisión de preámbulos para informar a la estación base de información específica cuando el terminal usa un RACH y la estación base puede asignar de manera eficiente un recurso de radiocomunicaciones para transmisión de datos al terminal de acuerdo con la información específica. Se reduce el tiempo de retardo antes de que el terminal transmita datos y se evita o por lo menos se minimiza el consumo de recursos de radiocomunicaciones. The features described herein can be implemented in such a way that a preamble transmission is used to inform the base station of specific information when the terminal uses a RACH and the base station can efficiently allocate a radio resource for transmission of data to the terminal according to the specific information. The delay time is reduced before the terminal transmits data and the consumption of radio resources is avoided or at least minimized.
En la medida en la que las características de la presente exposición se pueden materializar en varias formas sin desviarse con respecto a sus características, debería entenderse también que las formas de realización antes descritas no quedan limitadas por ninguno de los detalles de la descripción anterior, a no ser que se especifique lo contrario, sino que, más bien, deberían considerarse en un sentido amplio dentro de su alcance que se define en las reivindicaciones adjuntas. Por lo tanto, todos los cambios y modificaciones que se sitúan dentro de las medidas y límites de las reivindicaciones, o equivalentes de dichas medidas y límites, están destinados a quedar incluidos en las reivindicaciones adjuntas. To the extent that the characteristics of the present disclosure can be materialized in several ways without deviating from their characteristics, it should also be understood that the embodiments described above are not limited by any of the details of the above description, to unless otherwise specified, but rather, they should be considered in a broad sense within its scope defined in the appended claims. Therefore, all changes and modifications that fall within the measures and limits of the claims, or equivalents of said measures and limits, are intended to be included in the appended claims.
5 Las formas de realización y características anteriores son meramente ejemplificativas y no deben considerarse como limitativas. Las presentes enseñanzas se pueden aplicar fácilmente a otros tipos de aparatos. 5 The above embodiments and features are merely exemplifying and should not be considered as limiting. The present teachings can be easily applied to other types of apparatus.
La presente descripción está destinada a ser ilustrativa, y no limitar el alcance de las reivindicaciones. A aquellos The present description is intended to be illustrative, and not to limit the scope of the claims. To them
10 expertos en la materia les resultarán evidentes muchas alternativas, modificaciones, y variaciones. En las reivindicaciones, las cláusulas de medios-más-función están destinadas a cubrir la estructura descrita en la presente como ejecutora de la función mencionada y no solamente equivalentes estructurales sino también estructuras equivalentes. 10 experts in the field will find many alternatives, modifications, and variations evident. In the claims, the media-plus-function clauses are intended to cover the structure described herein as executing the aforementioned function and not only structural equivalents but also equivalent structures.
Claims (13)
- 2. 2.
- Método según la reivindicación 1, en el que el motivo de establecimiento comprende una de entre una llamada de emergencia, una transición de un estado de reposo a un estado activo y una transición de un estado desconectado a un estado activo. A method according to claim 1, wherein the reason for establishment comprises one of an emergency call, a transition from an idle state to an active state and a transition from a disconnected state to an active state.
- 3. 3.
- Método según la reivindicación 1, en el que la información de agrupamiento es recibida en uno de entre una información de sistema y un mensaje de búsqueda. Method according to claim 1, wherein the grouping information is received in one of a system information and a search message.
- 5. 5.
- Método según la reivindicación 1, en el que la ocasión de RACH es un recurso de radiocomunicaciones para transmitir la firma de RACH. Method according to claim 1, wherein the occasion of RACH is a radiocommunication resource for transmitting the RACH signature.
- 6. 6.
- Método según la reivindicación 1, en el que la información de agrupamiento es recibida a través de una información de sistema o de un mensaje de reconfiguración de conexión de RRC. Method according to claim 1, wherein the grouping information is received through a system information or an RRC connection reconfiguration message.
- 7. 7.
- Método según la reivindicación 6, en el que la información de agrupamiento es incluida en el mensaje de Method according to claim 6, wherein the grouping information is included in the message of
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USRE43949E1 (en) | 2013-01-29 |
TW200738005A (en) | 2007-10-01 |
US7881724B2 (en) | 2011-02-01 |
WO2007078165A1 (en) | 2007-07-12 |
BRPI0706353B1 (en) | 2023-01-24 |
US20090011769A1 (en) | 2009-01-08 |
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